SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mirai (Back to overview)

Mirai


There is no description at this point.

References
2019-05-08Verizon Communications Inc.Verizon Communications Inc.
@techreport{inc:20190508:2019:3c20a3b, author = {Verizon Communications Inc.}, title = {{2019 Data Breach Investigations Report}}, date = {2019-05-08}, institution = {Verizon Communications Inc.}, url = {https://enterprise.verizon.com/resources/reports/2019-data-breach-investigations-report.pdf}, language = {English}, urldate = {2020-05-10} } 2019 Data Breach Investigations Report
BlackEnergy Cobalt Strike DanaBot Gandcrab GreyEnergy Mirai Olympic Destroyer SamSam
2017-03-29ImpervaDima Bekerman
@online{bekerman:20170329:new:e4007ca, author = {Dima Bekerman}, title = {{New Mirai Variant Launches 54 Hour DDoS Attack against US College}}, date = {2017-03-29}, organization = {Imperva}, url = {https://www.incapsula.com/blog/new-mirai-variant-ddos-us-college.html}, language = {English}, urldate = {2020-01-05} } New Mirai Variant Launches 54 Hour DDoS Attack against US College
Mirai
2017-02-21Kaspersky LabsGReAT
@online{great:20170221:newish:1c13271, author = {GReAT}, title = {{New(ish) Mirai Spreader Poses New Risks}}, date = {2017-02-21}, organization = {Kaspersky Labs}, url = {https://securelist.com/blog/research/77621/newish-mirai-spreader-poses-new-risks/}, language = {English}, urldate = {2019-12-20} } New(ish) Mirai Spreader Poses New Risks
Mirai
2017-02-10Twitter (@PhysicalDrive0)@PhysicalDrive0
@online{physicaldrive0:20170210:mirai:51440a0, author = {@PhysicalDrive0}, title = {{Tweet on Mirai Windows Version}}, date = {2017-02-10}, organization = {Twitter (@PhysicalDrive0)}, url = {https://twitter.com/PhysicalDrive0/status/830070569202749440}, language = {English}, urldate = {2019-07-09} } Tweet on Mirai Windows Version
Mirai
Yara Rules
[TLP:WHITE] win_mirai_auto (20201014 | autogenerated rule brought to you by yara-signator)
rule win_mirai_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mirai"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { ff10 8985b8fdffff eb07 83a5b8fdffff00 8325????????00 a1???????? 8985ecfdffff }
            // n = 7, score = 100
            //   ff10                 | call                dword ptr [eax]
            //   8985b8fdffff         | mov                 dword ptr [ebp - 0x248], eax
            //   eb07                 | jmp                 9
            //   83a5b8fdffff00       | and                 dword ptr [ebp - 0x248], 0
            //   8325????????00       |                     
            //   a1????????           |                     
            //   8985ecfdffff         | mov                 dword ptr [ebp - 0x214], eax

        $sequence_1 = { ff7510 8d8548ffffff 50 ff7508 e8???????? 83c418 8b08 }
            // n = 7, score = 100
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   8d8548ffffff         | lea                 eax, [ebp - 0xb8]
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_2 = { f7f9 50 68???????? 689a010000 68???????? e8???????? 83c41c }
            // n = 7, score = 100
            //   f7f9                 | idiv                ecx
            //   50                   | push                eax
            //   68????????           |                     
            //   689a010000           | push                0x19a
            //   68????????           |                     
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c

        $sequence_3 = { 8d2c07 8b442438 8d0c30 8d1418 89542418 894c2428 8b4c2420 }
            // n = 7, score = 100
            //   8d2c07               | lea                 ebp, [edi + eax]
            //   8b442438             | mov                 eax, dword ptr [esp + 0x38]
            //   8d0c30               | lea                 ecx, [eax + esi]
            //   8d1418               | lea                 edx, [eax + ebx]
            //   89542418             | mov                 dword ptr [esp + 0x18], edx
            //   894c2428             | mov                 dword ptr [esp + 0x28], ecx
            //   8b4c2420             | mov                 ecx, dword ptr [esp + 0x20]

        $sequence_4 = { ff15???????? 2944b500 8b442464 83c410 ff0407 ebc2 8b742410 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   2944b500             | sub                 dword ptr [ebp + esi*4], eax
            //   8b442464             | mov                 eax, dword ptr [esp + 0x64]
            //   83c410               | add                 esp, 0x10
            //   ff0407               | inc                 dword ptr [edi + eax]
            //   ebc2                 | jmp                 0xffffffc4
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]

        $sequence_5 = { e9???????? 8b462c 3bc3 740c 50 e8???????? 83c404 }
            // n = 7, score = 100
            //   e9????????           |                     
            //   8b462c               | mov                 eax, dword ptr [esi + 0x2c]
            //   3bc3                 | cmp                 eax, ebx
            //   740c                 | je                  0xe
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

        $sequence_6 = { 8bcb e8???????? 8b7628 85f6 742c 8b5608 8d4c2410 }
            // n = 7, score = 100
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   8b7628               | mov                 esi, dword ptr [esi + 0x28]
            //   85f6                 | test                esi, esi
            //   742c                 | je                  0x2e
            //   8b5608               | mov                 edx, dword ptr [esi + 8]
            //   8d4c2410             | lea                 ecx, [esp + 0x10]

        $sequence_7 = { eb04 eb88 33c0 c9 c3 55 8bec }
            // n = 7, score = 100
            //   eb04                 | jmp                 6
            //   eb88                 | jmp                 0xffffff8a
            //   33c0                 | xor                 eax, eax
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_8 = { ff5004 8b45fc c9 c20400 55 8bec 51 }
            // n = 7, score = 100
            //   ff5004               | call                dword ptr [eax + 4]
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx

        $sequence_9 = { eb9b e9???????? 8365f000 6aff 8d45f0 50 8b4db8 }
            // n = 7, score = 100
            //   eb9b                 | jmp                 0xffffff9d
            //   e9????????           |                     
            //   8365f000             | and                 dword ptr [ebp - 0x10], 0
            //   6aff                 | push                -1
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   8b4db8               | mov                 ecx, dword ptr [ebp - 0x48]

    condition:
        7 of them and filesize < 7086080
}
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